Built by CCS 1 Posted January 12, 2020 (edited) Hey guys, I’ve got a 1985 Honda big red 250 ES, that had a fly wheel go out. I purchased a used one on eBay, and it’s too big for the stator that is on the bike, Resulting in no spark. The one I took off was a Mistuba and I am assuming the one I bought is a Denso. The part number on the fly wheel is 032000-4370. Can anyone help me with the correct part number for the stator? thanks in advance Tony Edited January 12, 2020 by Built by CCS Share this post Link to post Share on other sites
retro 3,870 Posted January 12, 2020 Hi, welcome to ATV Honda! You are correct, a Mitsuba stator must have a Mitsuba flywheel or it won't work. A Denso stator must have a matching Denso flywheel as well. Partzilla lists the part numbers for both supplier brands: https://www.partzilla.com/catalog/honda/atv/1985/atc250es-a-big-red/alternator Share this post Link to post Share on other sites
retro 3,870 Posted January 12, 2020 You may find the parts you need in our For sale/Trade forum. @Fishfiles lists some parts for the 250 Big Red here: Share this post Link to post Share on other sites
Built by CCS 1 Posted January 12, 2020 25 minutes ago, retro said: Hi, welcome to ATV Honda! You are correct, a Mitsuba stator must have a Mitsuba flywheel or it won't work. A Denso stator must have a matching Denso flywheel as well. Partzilla lists the part numbers for both supplier brands: https://www.partzilla.com/catalog/honda/atv/1985/atc250es-a-big-red/alternator The problem is that none of the part numbers match the one on my fly wheel. How do I figure out witch demos stator is correct? Share this post Link to post Share on other sites
Fishfiles 19,667 Posted January 12, 2020 That number you got off the flywheel isn't a part number , # 31110-HA0-004 is the part number for a Denso which was only used on a 85 , then some 85s and 86-87 it is a Mitsuba ---- I think the way it works is as long as you use the matching flywheel to stator combo you would be ok ----but what you got , I don't know ---- I think at this point you need to get a set or take a chance buying used if you don't see the words Denso or Mitsuba ---- seems I might remember something about one stator having like 7 and one 9 or something like that 1 1 Share this post Link to post Share on other sites
retro 3,870 Posted January 12, 2020 Ya buying a flywheel & stator set (of either brand) may be the best way to solve the problem. 1 Share this post Link to post Share on other sites
Built by CCS 1 Posted January 12, 2020 1 hour ago, retro said: Hi, welcome to ATV Honda! You are correct, a Mitsuba stator must have a Mitsuba flywheel or it won't work. A Denso stator must have a matching Denso flywheel as well. Partzilla lists the part numbers for both supplier brands: https://www.partzilla.com/catalog/honda/atv/1985/atc250es-a-big-red/alternator The problem is that none of the part numbers match the one on my fly wheel. How do I figure out witch demos stator is correct? Share this post Link to post Share on other sites
Built by CCS 1 Posted January 12, 2020 I’ll probably end up doing that if I can’t find a way to match the two up. You would think that it would be readily available especially if they made more than one type for that particular year. Thank you guys I appreciate your feedback. Share this post Link to post Share on other sites
retro 3,870 Posted January 12, 2020 The part number is not stamped on the flywheel, just a casting number which doesn't identify them. Both Mitsuba and Denso systems were supplied at the same time, so its a matter of getting lucky on the matchup when buying just one part. 1 Share this post Link to post Share on other sites
Fishfiles 19,667 Posted January 12, 2020 you can count the number of poles ( towers on the stator ) , I think that is the difference , but I have no clue on which one has how many --- I have some TRX250A engines , a couple are taken apart , but not on the stator side , so the stator and flywheel has to be in there , what part of the world are you 1 Share this post Link to post Share on other sites
Fishfiles 19,667 Posted January 12, 2020 seems the outside diameter of the stator that fits all 3 years of the 250es measures 103 mm od and is pictured in the link below from Rick's Stators https://ricksmotorsportelectrics.com/New-OEM-Style-Honda-Stator-21_628 1 Share this post Link to post Share on other sites
Fishfiles 19,667 Posted January 12, 2020 looks like 18 post , how many post do you have on yours 1 Share this post Link to post Share on other sites
Built by CCS 1 Posted January 12, 2020 I will have to pull it back apart tomorrow, I think I’m just going to end up replacing the fly wheel with the same type that I took off. I found them used on eBay for like 50 bucks. 1 Share this post Link to post Share on other sites
